Gas-turbine.



A. E. STACHEL.

GAS TUBBINE. l APPLICATION FILED DEG. 28, 1912A 1,073,71 '7. Patented Sept. 23, 1913.

2 SHEETS*SHEBT 1.

\o .w o xt l www# E N N 5 N w (n L sb w udmntoz A. E. STAGHEL. GAS TUBBINB. APPLICATION FILED 13110.28, 1912.

2 SHEETS-SHEET 2.

Patented Sept. 23, 1913.

UNTTED STATES PATENT OFFTCE.

ARTHUR E. STACHEL, F CHICAGO, ILLINOIS.

notar 17..

Specification of Letters Patent.

Patented Sept. 23, 1913.

` Application ied 'December 28, 1912. Serial No. 739,046.

'Itisfthebbject of the inventionto provide a novel 'and improved pressure-'generating chamber and'meansfor introducing an explosive mixture vthereinto, and also to vprovide means for scavenging said chamber aftereach explosionof the mixture.

These objects are attanedby a combination and 'arrangement of parts to described and claimed hereinafter, and 1n orderthat theinvention may be better understood,lreference is had to the accompanying l drawlngs in which#- Figure 1 is an elevation, largely diagrammatic andpart-ly in section, of the invention, and "Fig, '2 is a similar view showmg a 'slight .modification In the drawing, 5 denotes a chamber in which la pressure'is generated by igniting a charge of .explosive vapor or Oas. The pressure thus vproduced passes through Aa suitable conduit 6 to a'turbine or other rotary engine 7 ,the structure of which is immaterial to the present invention and'need therefore not'ibe described. To the shaft 8 of the engme is coupled a reciprocating pump 9 which draws a supply of gas or vapor throu h a pipeil() from any suitable source 'and elivers the same`into an auxiliary reservoir '11 connected by a conduit 12 to the pump outlet, a suitable check valve 13 being provided to prevent a return flow. The 4gas'inletof the pump also has a check valve 14. Thepump alsohas an air inlet 15 provided With a-check'valve 16. From the reservoir 11 a conduit 17 leads tothe inlet of the chamber 5, said inlet being provided with 'a valve .18 which opens periodically to admit gas or vapor into the chamber. The valve is spring-seated, and may be opened, for the admission of gas or apor into the chamber 5, by means of a: cam 19 on the engine shaft 8. The outlet 20 of the chamber 5 is' into the `conduit 6, and is provided with a spring-seated valve 21, which may Cool: and Statel also be operated by means of a cam 22 on the engine shaft S. The chamber 5 `has a second outlet 23 adjacent to the outlet 20, and connected by a conduit 24 with the conduit (l. ln thc conduit 21 is a relief valve 25 which is sp1'ing-seatcd and establishes communication between the chamber' 5 and the conduit (3, through the conduit 24, in case of an excessive pressure being generated in the chamber, and thus provides an outlet for such pressure.

The chamber 5 is provided with an airinlet valve 26 which opens automatically Vwhen the pressure in the chamber drops be low the atmospheric pressure. The chamber also has an outlet 27 for the residue of the spent gases, said outlet being connected by a conduit 28 with the suction inlet of a rotary fan 29 directly or otherwise coupled to the engine shaft S. The outlet 27 has a valve 30 which is spring-seated, and is opened periodically by means of a cam 31 on the engine shaft S and a suitable actuating de vice between the valve and the cam. Any other means may be provided for actuating the valve.

The charge in the chamber 5 is exploded periodically by a suitable electric ignition device 32 such as is employed in internalcombustion engines, a timing device being also provided. As these parts are well known and form 77er se no part of the present invention, a description thereof is not necessary.

The conduit 17. the gas supply pipe 14 and the air supply pipe 15 are provided with suitable controlling valves as shown.

In operation, the pump 9 fills the reservoir 11 with gas or vapor properly mixed with air, the vrichness' of the mixture being controlled bv means of the valves in the gas and air pipes leading to the pump. The valve in the conduit 17 being open, a charge is admitted into the chamber 5 each time the valve 18 opens, and when said valve closes the charge in the chamber is ignited. Then the explosion takes place the valves 21 and 25 open and admit the exploded gas at a high velocity to the engine 7, the blast being directed against the buckets or pockets o'f the rotor to impart motion thereto. The pressure in the chamber 5 now drops and the valves 2l and 25 automatically close, and at the same instant the .valve 30 opens which allows the fan 29 to eiihaust the residue spentv gases from the chamber. The

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partial vacuum created in the chamber by the exhaust action causes the valve 26 to open and admit fresh air into the chamber. The valves 26 'and 30 now close and the valve 18 opens to admit another charge into the chamber, whereupon .the herein described cycle of operations is repeated. The pump 9 is in constant operation and is designed to keep a surplus supply of gas in the reservoir l1. The" engine receives one impulse every revolution of the shaft 8, and the cams for operating the valves will be arranged to --eproduce the herein described opening movements of the .valves at the proper time. If it is desired to give the engine two or more impulses every revolution, the number of pressuregenerating-chambers must be ncreased accordingly.

Fig. 2 shows an engine Which receives two impulses every revolution, and consequently two pressuregenerating-chambers 5 are provided in Which the explosions take place alternately. In this form of the invention the exhaust valve 30 and fan 29 have been dispensed with. Otherwise the structure is the same as the one first described. Theoperation is also the same, except that the valve 2l is held open long enough to all-0W the spent gases in the chamber 5 lto pass out of the same. and to exhaust through the/ engine.

" I claim:

l. The combination of a motor, a pressuregenerating chamber having a fuel inlet,/and

an outlet connected to the motor', a valve =controlling the outlet, means for periodicall o enin said valve means oreriodi- Y v i v cally admitting a charge ofyfuel tothe chamber, means for igniting themharge in the chamber, an exhaust outlet `from'the chamber, a suction fan connected to said exhaust outlet, a valve controlling the exhaust outlet, means for eriodically opening the exhaust out-let va e, and a valve for admit` ting air to the chamber when the exhaust outlet valve is open.

2. The combinationof a motor, a pressuregenerating chamber having an outlet connected to the motor, a valve controlling the outlet, a fuel inlet to the chamber, a valve eontrollingthe fuel outlet means for igniting the. fuel in the chambe an exhaust outlet from the chambera suction fan -con-VV nected to said exhaust outlet, a valve controlling" the exhaust outlet, means for' opening the inlet, outlet and exhaust outlet valves in the order named, and a valve for admitting air to the .chamber when the exhaust outlet valve is open.-

3. The combination of a motor, a pressure'- generating chamberhaving afuel inlet, and an outlet connected by a conduit to the moi mitting a charge of fuel to the chamber,

means for igniting the charge in the chamber, an exhaust outlet from the-chamber, a suction fan connected to saidl exhaust outlet, a valve controlling the exhaust outlet, means forperiodically opening the exhaust outlet valve, and a valve for admittingair to the chamber when the exhaust outlet valve is open. 4. The combination of almotor, a pressuregenerating chamber haviilg a fuelinlet, and an outlet connected to t e motor, a. valve controlling the outlet, means for periodi- /cally opening said valve, means for periodically admitting a charge of fuel-,to the chamber, means for igniting the charge in the chamber, an exhaust outlet from the chamber, a suction fan connected to said ex- .haust outlet, a valve controlling the exhaust outlet, means for periodically opening the exhaust outlet valve,`a valve for admitting air to the chambenwhen the exhaust outlet valve is. open, a fuel reservoir connected to the inlet of the chamber, and a pump for charging said reservoir.'

5. -The combination of\ a motor, a pressurel generating chamber having a fuel inlet, and

an outlet connected-bya conduit to the motor, a valve controlling the outlet, means for periodically opening said valve, an outlet conduit from the chamber to the first-mentioned conduit, a relief valve in said outlet conduit, means for periodicallyadmitting a charge of fuel to l.the chamber, means for igniting the charge in the chamber, and a valve for admitting air to the chamber before the admission of the fuel charge.

6. The combination of a motor, a pressurevgenerating,cha ber having' a fuel inlet, and an outlet connwed by a conduit to the m0- tor, a valve cont olling the outlet, means forl periodifcallfy'ipening said valve, an outlet condvu'itfrom the chamber to the first-mentioned conduit, a relief valve in said outlet cond it, means for periodically admitting la chaig'eof fuel to the chamber, means for igniting the charge in the chamber, a valve Yfor admitting air to the chamber before the admission ofthe fuel charge, a fuel reservoir connected to the inlet of the chamber, and 'a pump for charging said reservoir.

ln testimony whereof I aflix my signature in presence oftwo witnesses.

ARTHUR E. -,STACHEL. Witnesses:

S. 'J. Ln, H'. G. Barometer. 

